01031422

Component

Durability of concrete-FRP bond is a very important factor in strengthening of concrete structures. This research is aimed at studying the time performance of concrete-CFRP bond under the effects of freeze-thaw cycles and sustained loading. For this purpose, 28 bond-test specimens under 2 different regimes were tested after 80 days of conditioning. Each specimen had CFRP strips bonded on two opposite faces of a concrete block. Two different levels of sustained loadings, 7.5% and 15% of the expected failure load, were used. The freeze-thaw profile was modeled using 20-year temperature data of Pittsburgh, PA. Test results show 1.1% to 9.9% reduction in failure load due to various conditioning regimes. The stiffness of the conditioned specimens also reduced in the range of 5.7% to 7.8%. The failure load of 15% sustained loaded specimens was found to be statistically different from the failure load of control specimens.

01020180

06-0011

English

24p

2006

Transportation Research Board 85th Annual Meeting

CD-ROM

Figures (9) ; References (6) ; Tables (5)

Bond strength (Materials); Bonding; Concrete structures; Continuously reinforced concrete pavements; Durability tests; Failure analysis; Fiber reinforced materials; Freeze thaw durability

Freeze thaw cycles; Sustained loading

Bridges and other structures; Highways; Materials; I32: Concrete

Transportation Research Board Annual Meeting 2006 Paper #06-0011

TRIS, TRB

Feb 28 2006 1:52PM